California-based loanDepot, which is the second-largest non-bank mortgage lender behind Rocket Mortgage, wrote in a filing that it "recently identified a cybersecurity incident affecting certain of the Company's systems." 

"Upon detecting unauthorized activity, the Company promptly took steps to contain and respond to the incident, including launching an investigation with assistance from leading cybersecurity experts, and began the process of notifying applicable regulators and law enforcement.

"Though our investigation is ongoing, at this time, the Company has determined that the unauthorized third party activity included access to certain Company systems and the encryption of data. In response, the Company shut down certain systems and continues to implement measures to secure its business operations, bring systems back online and respond to the incident."